Many factories around the world use perfluorinated chemicals to make everyday products. Due to their chemical stability, these compounds are “forever chemicals” They do not break down. Even worse, they can build up inside the human body and cause health problems, including cancer, and compromise the immune system. Companies have routinely dismissed campaigners who insist that cancer cases have risen close tofactories which use perfluorinated chemicals. They claim that only small amounts of chemicals are released into the environment. Our investigation proves that they are wrong.